I end up having multiple entries for addon manager in my add/remove programs list.. is that typical?
It could, if you removed some files manually at some stage, without using the proper uninstaller procedure. And, if you have P3D too, you'll have at least two entries.
However, having several entries in the Control Panel is not a problem, it's just cosmetic issue, it doesn't mean you have multiple copies of the program, if you want to get rid of them, uninstall them all, and then reinstall any product that comes with the Addon Manager, like KDEN 1.1, and then the Stand-Alone Addon Manager, but be absolutely sure you use the current installer.
Im going to try to update to 1.1 later. It wasmt automatic update via addon manager or couatl?
No, it's an update of the scenery itself, which requires either the patches or the new installer on the Flightbeam site.